src/ats/gnunet-service-ats.c

   1 /*
   2      This file is part of GNUnet.
   3      Copyright (C) 2011 Christian Grothoff (and other contributing authors)
   4
   5      GNUnet is free software; you can redistribute it and/or modify
   6      it under the terms of the GNU General Public License as published
   7      by the Free Software Foundation; either version 3, or (at your
   8      option) any later version.
   9
  10      GNUnet is distributed in the hope that it will be useful, but
  11      WITHOUT ANY WARRANTY; without even the implied warranty of
  12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13      General Public License for more details.
  14
  15      You should have received a copy of the GNU General Public License
  16      along with GNUnet; see the file COPYING.  If not, write to the
  17      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18      Boston, MA 02111-1307, USA.
  19 */
  20 /**
  21  * @file ats/gnunet-service-ats.c
  22  * @brief ats service
  23  * @author Matthias Wachs
  24  * @author Christian Grothoff
  25  */
  26 #include "platform.h"
  27 #include "gnunet_util_lib.h"
  28 #include "gnunet-service-ats.h"
  29 #include "gnunet-service-ats_addresses.h"
  30 #include "gnunet-service-ats_connectivity.h"
  31 #include "gnunet-service-ats_feedback.h"
  32 #include "gnunet-service-ats_normalization.h"
  33 #include "gnunet-service-ats_performance.h"
  34 #include "gnunet-service-ats_preferences.h"
  35 #include "gnunet-service-ats_scheduling.h"
  36 #include "gnunet-service-ats_reservations.h"
  37 #include "gnunet-service-ats_plugins.h"
  38 #include "ats.h"
  39
  40 /**
  41  * Handle for statistics.
  42  */
  43 struct GNUNET_STATISTICS_Handle *GSA_stats;
  44
  45 /**
  46  * Handle to the ATS server.
  47  */
  48 static struct GNUNET_SERVER_Handle *GSA_server;
  49
  50
  51 /**
  52  * We have received a `struct ClientStartMessage` from a client.  Find
  53  * out which type of client it is and notify the respective subsystem.
  54  *
  55  * @param cls closure, unused
  56  * @param client handle to the client
  57  * @param message the start message
  58  */
  59 static void
  60 handle_ats_start (void *cls,
  61                   struct GNUNET_SERVER_Client *client,
  62                   const struct GNUNET_MessageHeader *message)
  63 {
  64   const struct ClientStartMessage *msg =
  65       (const struct ClientStartMessage *) message;
  66   enum StartFlag flag;
  67
  68   flag = ntohl (msg->start_flag);
  69   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
  70               "Received ATS_START (%d) message\n",
  71               (int) flag);
  72   switch (flag)
  73   {
  74   case START_FLAG_SCHEDULING:
  75     if (GNUNET_OK != GAS_scheduling_add_client (client))
  76     {
  77       GNUNET_SERVER_receive_done (client,
  78                                   GNUNET_SYSERR);
  79       return;
  80     }
  81     break;
  82   case START_FLAG_PERFORMANCE_WITH_PIC:
  83     GAS_performance_add_client (client,
  84                                 flag);
  85     break;
  86   case START_FLAG_PERFORMANCE_NO_PIC:
  87     GAS_performance_add_client (client,
  88                                 flag);
  89     break;
  90   case START_FLAG_CONNECTION_SUGGESTION:
  91     /* This client won't receive messages from us, no need to 'add' */
  92     break;
  93   default:
  94     GNUNET_break (0);
  95     GNUNET_SERVER_receive_done (client,
  96                                 GNUNET_SYSERR);
  97     return;
  98   }
  99   GNUNET_SERVER_receive_done (client,
 100                               GNUNET_OK);
 101 }
 102
 103
 104 /**
 105  * A client disconnected from us.  Tear down the local client
 106  * record.
 107  *
 108  * @param cls unused
 109  * @param client handle of the client
 110  */
 111 static void
 112 client_disconnect_handler (void *cls,
 113                            struct GNUNET_SERVER_Client *client)
 114 {
 115   if (NULL == client)
 116     return;
 117   GAS_scheduling_remove_client (client);
 118   GAS_connectivity_remove_client (client);
 119   GAS_preference_client_disconnect (client);
 120 }
 121
 122
 123 /**
 124  * Task run during shutdown.
 125  *
 126  * @param cls unused
 127  * @param tc unused
 128  */
 129 static void
 130 cleanup_task (void *cls,
 131               const struct GNUNET_SCHEDULER_TaskContext *tc)
 132 {
 133   GAS_connectivity_done ();
 134   GAS_addresses_done ();
 135   GAS_plugin_done ();
 136   GAS_normalization_stop ();
 137   GAS_scheduling_done ();
 138   GAS_performance_done ();
 139   GAS_preference_done ();
 140   GAS_reservations_done ();
 141   GNUNET_SERVER_disconnect_notify_cancel (GSA_server,
 142                                           &client_disconnect_handler,
 143                                           NULL);
 144   if (NULL != GSA_stats)
 145   {
 146     GNUNET_STATISTICS_destroy (GSA_stats, GNUNET_NO);
 147     GSA_stats = NULL;
 148   }
 149 }
 150
 151
 152 /**
 153  * Process template requests.
 154  *
 155  * @param cls closure
 156  * @param server the initialized server
 157  * @param cfg configuration to use
 158  */
 159 static void
 160 run (void *cls,
 161      struct GNUNET_SERVER_Handle *server,
 162      const struct GNUNET_CONFIGURATION_Handle *cfg)
 163 {
 164   static const struct GNUNET_SERVER_MessageHandler handlers[] = {
 165     {&handle_ats_start, NULL,
 166      GNUNET_MESSAGE_TYPE_ATS_START,
 167      sizeof (struct ClientStartMessage)},
 168     {&GAS_handle_request_address, NULL,
 169      GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS,
 170      sizeof (struct RequestAddressMessage)},
 171     {&GAS_handle_request_address_cancel, NULL,
 172      GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL,
 173      sizeof (struct RequestAddressMessage)},
 174     {&GAS_handle_request_address_list, NULL,
 175      GNUNET_MESSAGE_TYPE_ATS_ADDRESSLIST_REQUEST,
 176      sizeof (struct AddressListRequestMessage)},
 177     {&GAS_handle_address_add, NULL,
 178      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_ADD, 0},
 179     {&GAS_handle_address_update, NULL,
 180      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_UPDATE, 0},
 181     {&GAS_handle_address_destroyed, NULL,
 182      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_DESTROYED,
 183      sizeof (struct AddressDestroyedMessage) },
 184     {&GAS_handle_reservation_request, NULL,
 185      GNUNET_MESSAGE_TYPE_ATS_RESERVATION_REQUEST,
 186      sizeof (struct ReservationRequestMessage)},
 187     {&GAS_handle_preference_change, NULL,
 188      GNUNET_MESSAGE_TYPE_ATS_PREFERENCE_CHANGE, 0},
 189     {&GAS_handle_feedback, NULL,
 190      GNUNET_MESSAGE_TYPE_ATS_PREFERENCE_FEEDBACK, 0},
 191     {NULL, NULL, 0, 0}
 192   };
 193   GSA_server = server;
 194   GSA_stats = GNUNET_STATISTICS_create ("ats", cfg);
 195   GAS_reservations_init (server);
 196   GAS_connectivity_init ();
 197   GAS_preference_init ();
 198   GAS_normalization_start ();
 199   GAS_addresses_init (server);
 200   if (GNUNET_OK !=
 201       GAS_plugin_init (cfg))
 202   {
 203     GNUNET_break (0);
 204     GAS_addresses_done ();
 205     GAS_normalization_stop ();
 206     GAS_reservations_done ();
 207     GAS_connectivity_done ();
 208     GAS_preference_done ();
 209     if (NULL != GSA_stats)
 210     {
 211       GNUNET_STATISTICS_destroy (GSA_stats, GNUNET_NO);
 212       GSA_stats = NULL;
 213     }
 214     return;
 215   }
 216   GAS_performance_init (server);
 217   GAS_scheduling_init (server);
 218
 219   GNUNET_SERVER_disconnect_notify (server,
 220                                    &client_disconnect_handler,
 221                                    NULL);
 222   GNUNET_SERVER_add_handlers (server, handlers);
 223   GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
 224                                 &cleanup_task,
 225                                 NULL);
 226 }
 227
 228
 229 /**
 230  * The main function for the ats service.
 231  *
 232  * @param argc number of arguments from the command line
 233  * @param argv command line arguments
 234  * @return 0 ok, 1 on error
 235  */
 236 int
 237 main (int argc, char *const *argv)
 238 {
 239   return (GNUNET_OK ==
 240           GNUNET_SERVICE_run (argc, argv, "ats",
 241                               GNUNET_SERVICE_OPTION_NONE,
 242                               &run, NULL)) ? 0 : 1;
 243 }
 244
 245 /* end of gnunet-service-ats.c */